See the top level README for information on where to find the schematic and programmers reference manual for the ARM processor on the raspberry pi. Also find information on how to load and run these programs. Same as blinker01 in the directory above, except the raspberry pi 1 A+ and B+ have two leds one on gpio47 the other gpio35. I tested this on an A+. I probably have a B+ around somewhere, but not sure where. The A+ does appear to have two leds and they are both blinking.